A few RTCs handle dates from year 0 to year 9999. Add a timestamp even if
years before 1970 will probably never be used.
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
---
include/linux/rtc.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index df666cf29ef1..2680f9b2b119 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -160,6 +160,7 @@ struct rtc_device {
#define to_rtc_device(d) container_of(d, struct rtc_device, dev)
/* useful timestamps */
+#define RTC_TIMESTAMP_BEGIN_0000 -62167219200ULL /* 0000-01-01 00:00:00 */
#define RTC_TIMESTAMP_BEGIN_1900 -2208988800LL /* 1900-01-01 00:00:00 */
#define RTC_TIMESTAMP_BEGIN_2000 946684800LL /* 2000-01-01 00:00:00 */
#define RTC_TIMESTAMP_END_2063 2966371199LL /* 2063-12-31 23:59:59 */
--
2.21.0
